Please also see this thread: http://originaltrilogy.com/forum/topic.cfm/Whats-your-Personal-Canon/topic/13172/
As some of the others said: given a Yes/No option, I would have to side on the side of No. There is far more bad EU than there is good EU. However, since I have the option of being very selective- I will say that there is some EU that I like very much and other that is probably worse than the PT- except that its impact is much more contained. Both in terms of what percentage of the audience has been exposed and what percentage of other Star Wars/EU stuff is directly affected.
And, as a quick aside, this is a fantasy universe that includes both Dark Magic users and cloning technology- I don't see how you can't have the darkest of dark magic users use cloning technology to achieve some kind of immortality and bring himself "back from the dead."